Confidential Computing for Sovereign AI: The Emerging Opportunity in Japan ーBuilt on Global Innovation, Governed by Sovereign Trust.ー 

©️Acompany Co.,Ltd. 2 Who We Are • Pioneering confidential computing in Japan • Trusted by leading enterprises and government • Leading Japan’s Privacy Tech Association and national discussion on PETs regulation Shuzo Ueki — CFO From strategy consulting to venture capital, now CFO. Bridges deep tech with enterprise go-to-market and capital strategy. Japan’s Confidential Computing Startup Takeharu Kondo — Co-founder & CRDO Built Acompany's MPC engine "QuickMPC" from scratch. Now leads R&D on making TEE and privacy tech production-ready. 

©️Acompany Co.,Ltd. 3 Redefining Sovereignty Sovereignty is “control of trust”, not ownership How Trust is Earned Trust must be technical and verifiable Market Opportunity With the right trust layer, Japan is wide open Our Thesis 01 02 03 Three beliefs that frame everything that follows 

©️Acompany Co.,Ltd. 4 “Sovereign AI” is Now a Global Agenda Governments are increasingly framing AI and data as pillars of economic security and national strategy Stargate UAE National-scale sovereign AI data center UAE Mistral AI Europe’s sovereign frontier model France National AI Plan $7B investment in AI — public and private Japan Supercomputer $890M investment in sovereign AI supercomputer Canada 

©️Acompany Co.,Ltd. 5 Why Japan? ー A Premium Trust Market Huge demand, the world’s strictest trust standards ー and the most valuable data still locked out The demand is here. But what does “sovereign AI” require? Japan Cloud / AI Market (2029) $120B Regulated Industries (~50%) $60B Locked Out by Confidentiality $30B The market sovereign AI can finally reach Data Source: IDC Japan “Japan’s cloud market size forecast”, Gartner ”Japan's Enterprise IT Spending Forecast to Grow 4.7% in 2023” 

©️Acompany Co.,Ltd. 6 Deconstructing “Sovereign AI” ー 5 Components Sovereign AI is built upon five essential components below Does every component need the same level of sovereignty? Governance The trust layer that governs how everything else is used Locus of Sovereignty Data The sensitive, high- value data that fuels AI Source of Value Computing Infrastructure Model The processors and accelerators that power computation The cloud and data center infrastructure that delivers scale The frontier and domain models that generate intelligence Engine of Intelligence Foundation of Scale Layer of Intelligence 

©️Acompany Co.,Ltd. 7 Sovereignty Has a Gradient Sovereignty is not self-sufficiency. Sovereignty is “control of trust” Governance The trust layer that governs how everything else is used Locus of Sovereignty Data The sensitive, high- value data that fuels AI Source of Value Computing Infrastructure Model The processors and accelerators that power computation The cloud and data center infrastructure that delivers scale The frontier and domain models that generate intelligence Engine of Intelligence Foundation of Scale Layer of Intelligence Leverage globally Protect domestically Govern with accountability 

©️Acompany Co.,Ltd. 8 What “Control of Trust” Actually Means “Control of Trust” means guaranteeing 3 things ー “Confidentiality”, “Integrity”, “Availability” So how do we guarantee the first two things? Confidentiality (Unseen) No one sees the data inside, not even the cloud it runs on. Integrity (Untampered) What runs is provably the real thing, untampered. Availability (Unstoppable) It cannot be switched off by someone else's decision. Solved by Technology Solved by Choice 

©️Acompany Co.,Ltd. 9 Three Layers Converge on One ー Confidential Computing Built on global innovation, governed by sovereign trust The Sovereign AI Stack Cloud Infrastructure Chip Manufacturers Hardware Middleware AI (Model) Confidential Computing Technical foundation that keeps data and AI models confidential … … Governance (Control of Trust) Powered by Confidential Computing … Root of Trust Intelligence Scale 

©️Acompany Co.,Ltd. 10 Confidentiality and Integrity ー Already Solved You know this well: The TEE shields the data. Attestation verifies the workload Confidentiality (Unseen) Integrity (Untampered) • Computation runs inside a TEE — data is protected even in use • Not even the cloud or SaaS provider can see inside. CPU Memory An attacker who seizes administrator privileges cannot read it, because it remains encrypted TEE • The TEE generates a signed proof of what's running, on genuine hardware • The user verifies it before sending data — tampering makes verification fail. TEE Request “I’m running Code X on genuine hardware” ○ Verified → Send data × Tampered → Reject 

©️Acompany Co.,Ltd. 11 Who Verifies the Verifier? Sovereign trust should not be closed trust. The proof itself must be open — and anyone must be able to check it Solution: Open Verifiability Problem: Closed Trust “Just trust us.” If the attestation logic is a black box, you are not verifying — just believing. A proof you can’t inspect is not proof. “Check it yourself” We make the attestation logic public — anyone can read, audit and confirm it. Our contribution to the community: trust that doesn’t ask for faith. ？ Just Believe Verification logic: hidden Verification logic: public Inspect & Verify Inspect & Verify 

©️Acompany Co.,Ltd. 12 We launched "Humane Attestation" — Open-Source, Easier Attestation • We turned "open verifiability" into working code — released as permissive open-source, free for anyone to use • Supported technologies: • Intel SGX/TDX, AMD SEV-SNP, NVIDIA CC, AWS Nitro Enclaves https://humane-attestation.io/ 

©️Acompany Co.,Ltd. 13 Momentum Is Building — Sovereign AI Is Real in Japan From chip to model, Japanese players are moving fast and our trust layer connects them all Neutral trust layer — Confidential Computing We enabled a model “cotomi” to run inside the CC environment Intelligence Governance of Trust We made their cloud CC-ready Root of Trust & Scale Made in Japan Technology "FUJITSU-MONAKA" Verified Verified Collaborating 

©️Acompany Co.,Ltd. 14 Collaboration with Fujitsu • Fujitsu plans to launch an Arm CCA-enabled CPU “FUJITSU-MONAKA” in 2027 • Acompany is collaborating with Fujitsu to expand the Japanese CC market Data Source: “Driving Japan's digital future: Fujitsu's full-stack development for sovereign platform” 

©️Acompany Co.,Ltd. 15 Collaboration with NEC • Successfully validated NEC's generative AI "cotomi" running with AMD SEV-SNP and NVIDIA Confidential Computing enabled • Inference benchmark (Time to First Token / TTFT) shows at most ~10% performance degradation vs. non-CC environments Data Source: https://prtimes.jp/main/html/rd/p/000000134.000046917.html 

©️Acompany Co.,Ltd. 16 Collaboration with Sakura Internet • Enabled Intel TDX and NVIDIA Confidential Computing on Sakura Internet's Xeon + H200 servers • Successfully performed remote attestation on AI workloads running inside the TEE Data Source: https://www.sakura.ad.jp/corporate/information/newsreleases/2026/06/23/1968225041/ 

National Security 40M users’ data — Processed in TEE Details remain classified We are trusted at the highest levels Fortune Global 500 ©️Acompany Co.,Ltd. 17 Strategic Partnership with KDDI – a Fortune Global 500 Telecom 

©️Acompany Co.,Ltd. 18 Already running in production • Fortune Global 500 company KDDI runs its data collaboration on our Data Clean Room • It combines its 40M-user data with partner data for statistical analytics and AI, driving smarter sales and marketing Location Data Attribution Data Partner Company POS Data Purchase Data Data Collaboration Platform Revenue Contribution Acquisition of new customers Shop optimization • Statistical Analytics • AI Training • AI Inference 

©️Acompany Co.,Ltd. 19 IN PRODUCTION Already running in production • Fortune Global 500 company KDDI runs its data collaboration on our Data Clean Room • It combines its 40M-user data with partner data for statistical analytics and AI, driving smarter sales and marketing Location Data Attribution Data Partner Company POS Data Purchase Data Data Collaboration Platform Revenue Contribution Acquisition of new customers Shop optimization • Statistical Analytics • AI Training • AI Inference 

©️Acompany Co.,Ltd. 20 What's Missing — and What We Ask of You The trust layer is ready. Three gaps remain — and here is what we ask of you Confidential Computing itself is still little known Chip Cloud / Data Center Frontier Model Confidential VMs aren’t available in the Japan region Few domestic frontier-model providers exist Co-market the category with us Offer Confidential VMs in Japan Host your models in Japan Together, we complete Japan’s Sovereign AI ecosystem. 

©️Acompany Co.,Ltd. 21 Shuzo Ueki — CFO Takeharu Kondo — Co-founder & CRDO Email: [email protected] Email: [email protected]